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Discussion Starter #1
This evening I had the bike up on a stand while doing some chain maintenance and thought I'd run it at idle in 1st out of curiosity and I noticed a degree of lateral runout. Up and down was ok, the wheel looked true and the brake disc was ok. Has anyone else seen anything similar or does mine have a problem?

Video 1
Video 2
Video 3

Thanks for looking!
 

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That doesn't look good, if as you say the rim is running true then it looks like the bearing in the sprocket carrier is shot.
Strangely the only breakdown I've ever had on the road was that same bearing on my 1250 Bandit, I was in the middle of France on a Friday afternoon heading for the ferry at Calais and had to get the bike recovered back to the UK.
It only cost about £35 to get repaired.
 

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Discussion Starter #3
That doesn't look good, if as you say the rim is running true then it looks like the bearing in the sprocket carrier is shot.
Strangely the only breakdown I've ever had on the road was that same bearing on my 1250 Bandit, I was in the middle of France on a Friday afternoon heading for the ferry at Calais and had to get the bike recovered back to the UK.
It only cost about £35 to get repaired.
Coincidentally I had the wheels painted a short while ago and the bearings were left in place I believe. I should probably get his opinion since he was the last person to remove and reinstall the wheels.
 

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This evening I had the bike up on a stand while doing some chain maintenance and thought I'd run it at idle in 1st out of curiosity and I noticed a degree of lateral runout. Up and down was ok, the wheel looked true and the brake disc was ok. Has anyone else seen anything similar or does mine have a problem?

Video 1
Video 2
Video 3

Thanks for looking!
I don't think it is anything to be concerned with, IMHO. To me, it just looks like the chain may be running back and forth across the sprocket. Remember, the sprocket is not bolted to the rear wheel. The sprocket is bolted to a carrier, the carrier (or hub, whatever it is called) fits into the cush drives, the cush drives are inserted into the rear wheel hub. How close to a machined surface do rubber cush inserts provide? Actually, as I type, I realize somewhat irrelevant, because a bearing is in the rear carrier which will center the carrier over the axle. Did you ever check this prior to the wheels getting painted? Have you checked the cush inserts? How much wear is on the chain? Is the rear wheel parallel to the rear swingarm pivot, so that the chain sprockets are parallel? And coplanar, as opposed to offset? How much runout is in the rear wheel? Do you have a dial indicator to measure? Specs are max 2mm/.080" axial and radial. Does the same movement occur when you rotate the rear wheel by hand? Or only when revved by the engine? What about sprocket runout, how much is there?
 

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This evening I had the bike up on a stand while doing some chain maintenance and thought I'd run it at idle in 1st out of curiosity and I noticed a degree of lateral runout. Up and down was ok, the wheel looked true and the brake disc was ok. Has anyone else seen anything similar or does mine have a problem?

Video 1
Video 2
Video 3

Thanks for looking!
Flashp, watching you're video of chain/sprocket runout, it looks to me like the sprocket carrier bearing isn't in square or not seated properly. Might be wrong, but worth a check.
 

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I'm thinking the same. I wouldn't listen to Gritty (probably on the Xmas Sherry ;) )
Something is definitely wrong and I'd start with the bearings and spacers and make sure they are healthy and fitted correctly
 

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(probably on the Xmas Sherry ;) )
Nope. This is au-naturel. Hard to believe somebody can the this way sober, I know!

"I wouldn't listen to Gritty "
Just a question. What does your sprocket do, is it smoother with no runout? I have not looked at mine, to be honest. Have you checked yours?
Why would you not listen to me?
What question or statement was incorrect or irrelevant?
If there was a serious issue, why wasn't it noticed on riding?

Please explain further. I personally am curious what others feel is incorrect or needs further verification. Constructive comments welcome as we can all learn from each other.
 

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Just been and checked mine and it runs dead true. You can see the run out in the video where the oil seal bears on the spacer.
 
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Discussion Starter #9
Thanks all for your input and time taken. I'll have more space in the garage on Friday so I'll put a DTI clock on the sprocket to see exactly how much deflection there is when I turn it by hand. I've not changed bearings on a bike before, am I likely to need any pullers/specialist tools etc for this if it gets to that? I don't mind buying tools, I just like to know what I'm likely to need to need before I get involved.

@dekker, I need to buy and download the workshop manual I think!

@gritty
Did you ever check this prior to the wheels getting painted? No, never gave it any thought.
Have you checked the cush inserts? No, I suspect I may end up taking things apart over the coming weekend.
How much wear is on the chain? Very little I imagine/hope. The bike has only 1500 miles on it and the chain has been looked after.
Is the rear wheel parallel to the rear swingarm pivot, so that the chain sprockets are parallel? The axle is positioned in the same place each side according the markings on the swingarm.
And coplanar, as opposed to offset? Haven't checked.
How much runout is in the rear wheel? None that's discernable. Disc also looks true - can clock this on Friday.
 

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Discussion Starter #10 (Edited)
WTF is going on with this manual download?? It looks like sections 1J, 1K, 2 & 3 (at least) are missing or have I missed something? Not checked the rest of it yet.
EDIT - it skips from 5B to 9B. 🤬 🤬 🤬 🤬


44618
 

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I've not changed bearings on a bike before,
Might need bearing puller? I say that because I tend to do things in ways others do not think to. You can probably knock out original bearings with a punch. For removal, hitting the inside race destroys the bearing. It is OK because the bearing is getting replaced anyway. Installation ideally is done with a press. Most do not have, and I never used myself. I will use the old bearing outside race, ground down for slip clearance in the bore. Place on new bearing and use a hammer to tap new in. Some say never hit a bearing with hardened steel (hardened hitting hardened). Technically, you are not hitting the bearing this way though. You are hitting the old bearing, which is against the new bearing. Or, if you can source it, get a brass punch. Use the brass against the bearing, tapping equally all around so as to not tilt the bearing axis away from the wheel axis more than a few degrees.

Regardless of what the final outcome is, some exploratory work is in order. Whatever, you find, please share with the rest of us. Thanks.
 

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a few things I would start of by checking is
alignment marks, make sure wheel is aligned
alignment block are the right way around
Spacers installed between frame, axle and wheel
all Cush drives installed correctly and seated all the way in,

things to check maybe as well, try moving the wheel from side to side, top/bottom and left/right to see if there is any play
Also what is the alignment between the rear and front sprocket on the top and the bottom?(your first video is just a bit to low to see how the cain runs to the front, seeing what it does top and on the bottom from the front sprocket to the rear )

also find out from the guy if he removed or tried to remove the bearings as they are pressed in, so unless he/you fiddled with them , they would probably be OK,
 

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"I wouldn't listen to Gritty "
Just a question. What does your sprocket do, is it smoother with no runout? I have not looked at mine, to be honest. Have you checked yours?
Why would you not listen to me?
What question or statement was incorrect or irrelevant?
If there was a serious issue, why wasn't it noticed on riding?
Just a question. What does your sprocket do, is it smoother with no runout? I have not looked at mine, to be honest. Have you checked yours?
Regularly. As I also do with the rest of the bike. It doesn't take five minutes to check, tyres ,brakes, suspension, chain etc. It should be part of your daily checks when ever you ride.

Have you checked yours?
See Above.

What does your sprocket do, is it smoother with no runout? I have not looked at mine, to be honest

Not looked at yours. Maybe you should. Actually, maybe it's time to give the whole bike a going over. You wouldn't want to have to suddenly make an emergency repair when a bit of preventative maintenance could have saved you the time, money and inconvenience of a breakdown.

Why would you not listen to me?
What question or statement was incorrect or irrelevant?

I'll answer these two together. You specifically said "I don't think it is anything to be concerned with, IMHO."
Simply put, from the video it is obvious there is a serious problem and I strongly disagreed with your statement. There are a lot of stresses going through the final drive assembly and if something isn't looking right or is sounding off it needs to be investigated fully as a resulting failure could be catastrophic not only to the bike but possibly the rider or another road user.

If there was a serious issue, why wasn't it noticed on riding?

This goes nicely back to my first response. If you are doing regular maintenance checks you can prevent bigger problems before they become an issue. Acting proactively before you are out on the road and "feel" there is something wrong with the bike is not the best way. If you can catch something before you go out you'll probably have a lot safer and happier riding experience.

Soz, sounds a bit sanctimonious when reading it back but you did ask ;)
 

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WTF is going on with this manual download?? It looks like sections 1J, 1K, 2 & 3 (at least) are missing or have I missed something? Not checked the rest of it yet.
EDIT - it skips from 5B to 9B. 🤬 🤬 🤬 🤬


View attachment 44618
You can find things but it is very difficult I am regretting recommending it.
I've just emailed them for a refund but don't hold out too much hope as they did mention that there was some "overlap" of pages.
The thing is there is no relationship between the thumbnail numbers and the contents list.
 

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Discussion Starter #15
You can find things but it is very difficult I am regretting recommending it.
I've just emailed them for a refund but don't hold out too much hope as they did mention that there was some "overlap" of pages.
The thing is there is no relationship between the thumbnail numbers and the contents list.
No worries, you were trying to help and I appreciate that (y)
I might try for a refund through PayPal as it's covered by their buyer protection scheme apparently.

I mailed them but have had no response as yet. If it goes **** so be it, it's not a fortune and life's too short! 😁
 

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Soz, sounds a bit sanctimonious when reading it back but you did ask ;)
And you answered. Fair enough. Feelings not hurt much :)

Sharing ideas, helps us all, again IMHO.
@Flashp let us know what you find.
 

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Discussion Starter #17
And you answered. Fair enough. Feelings not hurt much :)

Sharing ideas, helps us all, again IMHO.
@Flashp let us know what you find.
Will do. Having given it some thought and a bit of research I think my problem originates from the sprocket carrier bearing. I've sent a mail to the supplying dealer asking for their comments.
I'm also inclined to think it's always been there. When you look online this problem isn't uncommon.

I will of course update here when I've had a reply. The service manager is back in the dealership tomorrow so by early next week I should have heard something.
 

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Discussion Starter #18
I sent a mail to the dealership the other day who have responded positively. They've said the bike is OK to ride and that they put one of theirs on a stand and checked it the same way. They saw the same thing but to a much lesser degree and have requested that I drop the bike in for them to have a look at when Covid restrictions allow. I'm in tier 4 so not able to get there this side of the new year.
 

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.... They saw the same thing but to a much lesser degree ...
And when I said
"I don't think it is anything to be concerned with, IMHO. " I got skewered.

As you learn more, please continue updating. I think we can all learn from your experience and be better for it. Thanks!
 

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Discussion Starter #20
And when I said
"I don't think it is anything to be concerned with, IMHO. " I got skewered.

As you learn more, please continue updating. I think we can all learn from your experience and be better for it. Thanks!
Will do. They only thing they asked to do ASAP was to check the carrier bearing for slack, like you would a wheel bearing. It was solid and secure so they said it's fine to ride. Merry Christmas! 🎅
 
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